Machine for forming the ends of paper tubes



Aug. 23, 1932. T. FARRQW MACHINE FOR FORMING THE ENDS OF PAPER TUBES 5 Sheets-Sheet I 1 Filed March 19, 1931 Au 23, 1932. T. FARRQW 5 1,873,366

MACHINE FOR FORMING THE ENDS OF PAPER TUBES Filed March 19, 1951 3 Sheets-Sheet 2 Aug. 23, 1932.

T. FARROW MACHINE FOR FORMING THE ENDS OF PAPERTUBES Filed March 19,- 1931 3 Sheets-Sheet 5 Fig.6.

' iNVENTOR.

Patented Aug. 23, 1932 g UNiTEosTATEsrArEN g w 1i;p

Ton FARBoWQoF AsnToN-uuDER-nmm, ENGLAND MACHINE non FORMING TI-IE unsen PAPERTUBES Application filed March 19, 1931, Serial No..523,761 and in GreatBritain May 27, 1930;

The invention relates to improvements in paper tubes such as those used for lnsertlon in the ends of cigarettes and in machines for v 4 devlcewhich prevents rotation of a tube on forming such tubes. I,

The tube according to the invention is formed of a number of layers or convolutions of paper which are spun over at one end so that the bore or central aperture at such end is of less diameter than that of the tube thus enabling the latter to serve as a. receptacle or housing for a disc or wad of absorbent material at the end of the cigarette.

The machine for spinning over the ends of the tubes comprises essentially an'intermittently rotating table provided with a number of upwardly projecting pins onto each of which a tube is placed and is carried thereon underneath a revolving pressing or splnnin-g. tool controlled by cam or other mechanism to be lowered into engagement with the end of the tube when the tube is stationary below it, the intermittently rotating table having a dwell as each pin comes below the revolvlng tool.

' The invention will be described with reference to the accompany ng drawmgs Fig. 1 is a perspective View of paper tube before having its end spun over a Fig. 2 is a perspective view of fin shed tube after having its end spun over accordmgto the invention.

Fig. 3 is a longitudinalsection through'a cigarette having a tube formed according-to the invention incorporated in the end thereof.

Fig. 4 is a side elevation of the machine for forming or spinning over the end of the tube.

Fig. 5 is a front elevation thereof.

Fig. 6 is a planof same.

Fig. 7 is a section on line 7--7 of Fig. 6.

' Fig. 8 is a. plan'view of stationarycam plate situated below the revolving table of the machine.

Fig. 9 is a section on line 99 of Fig. 8.

Fig. 10'is a sectional elevation on a larger scale of one of the pins carrying the tubes and of the lower portion of the revolving tool for forming or spinning over the end of the tube.

The tube A (Fig; 2) for insertion in "the end ofa cigarette asshown in Fig.3 is formed from a paper tube A Fig. 1 having a: number of convolutionsor layers of paper to make it sufiiciently rigid. Thetube A isformed from. the tube A by spinning or pressing ,over'one end of the tube A to produce an inturned flange on leaving a central bore'or aperture a of less diameter than the diameter of as the tube A. A disco. or-a wad otabsor'bent material is placed in the tube Aadja'cent to the inturned flange a and thetubexis then.

inserted in the end of the cigarette cA Qas shown in Fig. Thecigarette A is manufactured so that there is notobacc0 at the end where thetubeA is inserted or the tobac co is removed therefrom ibefore the insertion of the tube. i b The machine for spinning over or forming theinturned flange a ofthe tube A comprises atable 'Blha-ving a l central downwardly {projecting'stem B carried in a foot step bear} ing B supported by the framing of the .machine. A: spur wheel B? is formed on'o'r affixed to. the circumferential edge jofthe table B and is driven .by a spur pinion C on the upper end of a vertical shaft G The lower end of the shaft C carries'abevel wheel C? which is drivenfrom abevel wheel" D on thedriving shaft D Thebevel wheel Dis mutilated, i. e. a number or" teethare omitted therefrom, so that the bevel wheelC? is only intermittently driven and, conse quently an intermittent rotation is given .to the table B. In the drawings the wheel Dfis, shown with half the teethmissing which will give to the table B a movement and a dwell of equal time. This however can be varied 'if'desired by varying the number of teeth omitted fromfthe wheel The table .13 is provided with a number ofvertical holes b eachspa'ced at an equal or peg E projects from the underside of the table through each hole 72. There may be any convenient number of holes I) and pins E and the ratio of the gearing driving the table is such that the table 13 rotates an angular distance equal tothe angular distance between two adjacent holes at each movement and then has a dwell or stationary period caused by will be of equal length.

' Each pin E normally projects above the level of the table '13 a distance equal to the length of the tube A after forming the flange a the tube A projects above the top of the pin a distance equal to theamount by which it is shortened by the formation of the flange.

The lower end of each pin E is formed with arounded head a which rests on a stationary plate or disc F affixed on the footstep bearing B by the set screw f which permits of adjustment of the disc or plate F relative to the table B. spring 6 is arranged around each pin E between the head 6 thereof and the underside of the table B, which spring tends towithdrawthe pin E from above the surface of the table.

4 A gripping device is mounted on the table B adjac'entto each pin E and is adapted to' grip the tube A. on the pin during apart of the revolution'of the table B so that the tube is held duringthe operationof the finishing or pressing'tool H thereon. The ripping device comprises two sliding jaws Gr connected by alpair of springs g which tend to force the jaws together on to the tube A. Each jaw is provided with a leg or projection g which extends below the lower surface of, the table andengages one of a" pair of ramps or curved rails F F The ramps or ralls E F are such a dis: tance' apart that when the legs I g of the afiixed on the upper surface of the stationary jaws G G are'in contact therewith, tlfelatter are held open against the action of the springs 9. When however the legs 9 have moved, by the rotation of thetable B, beyond the ramps orrails F, F? the springs 9 will close the jaws and grip the tube A on the pin E,

r The tool H for forming the inturned flange a of thetube is arranged'to operate successively on each tube as the latter is brought beneath itby'the rotation of the table 13', the

movement of the latterbeing so timed that the'table B has a dwell or stationary period each time a pin E'w'ith a tube'upo'n it is im' mediately-below the tool H. The'tool His 1 .in its bearings H by the two armed lever K the outer end of which is connected by the connecting rod K to a pivoted le'verK below'the driving shaft D A cam K is mounted on the driving shaft D which depresses the lever K at each revolution of the shaft so that the tool'I-Iisbrought down on to the upper end of a tube A each time a pin Estops below it, the cam K being so arranged onthe shaft D that .itengages the lever K during the period the tableB is stationary. The lower end of the tool H is'formed as shown in Figs. 10 and 11 with a 'central projection 'h which passes into a corresponding central recess 6 in'the top of the pin'E and an outer ring 7& carrying four horizontal shaping pins [7L2 which engage the end ofthe tube A projecting above. the pin E and'as the head is lowered, press or spin over this portion of the tube to form the'inturned flange a. 7

To remove thetube A from its pin E after the flange a has been formed'by the tool- H it isnecessary that the pin E should be with drawn from above the top of the table B and to permit of such withdrawal a recess f with inclined sides f isformed in'the disc F in the track of the head-'6 ofthe pin E so that" when the pin E is above this recess it will be drawn down by the spring 6 awa y'from the table B and the tube" A will be released.

Mechanism is' provided for knocking the finished tube A off the table B into a suitable receptacle after the pin E- has been withdrawn from the tube. This mechanism com-- prises an arm'L, the end Zof which'is'moved over'the surfaceof the table by the rotation of a vertical shaft M to the'top of which the other end Z of the-arm L is affixed; Thef lower end of. the vertical shaft M isprovided with'a horizontal arm 'm 'termina'ti'ng in an of a curved camface M mounted on the'driving shaftD "Thus at each revolution of the sha'ft'l) a rotary movement is impa-rted to the shaft M whichcau'ses the end Z of the arms L to move overjthe surface of the table- B and sweep'the tube A off the table. U

The operation of themachine is as 'follows:- v

A tube A is placed, whilst the table is'stationary, by the operative on the ,pinfat' the position 1.on the table B wliichpoint is diametrically'opposite the position 6 where the pressing or. forming tool His situated. At thepoint 1 the aws Gt, G lof the gripper are held open by the ramps or rails-F F so enlarged end m which projects into the path that the tube A can be readily placed over a the projecting portion -ofthe pin. At ieaclr further intermittent movement of thetable from the position l-tothe position 2, from the position 2 to the position 3, after passing position 3, the legs 9 of the jaws G, G pass away from the ramps or rails F F so that the'j aws are closed bythe springs g on to the tube A by the time the pin and tube have reached position 4. The further intermittent rotation of the table carries the pin and tube to position '5' and then to position 6immedia-tely below the tool H. There it is opdrawal of the pin E by its controlling spring is also situated between the positions 8 and 9 so thatthe p1n E is withdrawn from the tube A as soon as it has been released by the gripper jaws and'the tube is then resting freely on the surface of the table without being held in any way. 'As 'soon as the pin E has been withdrawn the mechanism for knocking the tube A from the table comes into operation and the finished tube is removed thereby into any convenient receptacle. By the time the pin has reached position 10- the head 6 of the pin E has traveled out of the recess 7 so that the pin again projects I through the tables B and is ready to receive a new tube A when it reaches the operative at position 1, the whole cycle of operations being then repeated on the new tube A It will be understood that the above described cycle of operations takes place with each pin E on each complete rotation of the table, theoperative placing a new tube A on each pin E as it passes position 1. Thus in the machine described above having ten pins 'i E and rotating one-tenth of a revolution at a time, ten tubes A are formed for each revolution of the table.

hat I claim as my invention and desire to protect by Letters Patent is 1. A machine for pressing or spinning over the end of a paper tube to form an inturned rim at such end comprising the combination with an intermittently rotating table of a plurality of upwardly projecting pins thereon to receive the tubes, a revolving shaping tool below which the tubes are successively carried by the intermittent movement of the table, a cam for bringing the shaping tool into engagement with the end of each tube as it is stationary below the tool to form the inturned rim and means for causing the withdrawal of each pin below the surface of the table after the tube thereon has been acted upon by the shaping tool.

the end of a paper tube to form an inturned rim at such end comprising the combination with an intermittently rotating table of a plurality ofu-pwardly projecting pins thereon to receivethe tubes, a revolving shaping tool below which the tubes are successively carried by the intermittent movement otthe table, a cam for bringing theshaping tool into engagement with the end of each tube as it is stationary below the tool to form the inturned rim, a gripping device adjacent to each upwardly projecting pin to grip the tube thereon at the period during which it is being operated upon by the shaping tool and means for causing the Withdrawal of each pin below the surface of the table after the tube thereon has been actedupou by the shaping tool. i

3. A machine for pressing or spinning over the end of a paper tube to form an inturned rim at, such end comprisingthe combination with an intermittently rotating table of a pinrality of upwardly projectingpins thereon to receive the tubes, a revolving shaping tool; below which the tubes are successively carried by' the intermittent movement of the table, a I

earn forbringing the shaping tool into on:

gagcment with the end o1 each tube asit is stationary below the tool to form the inturned rim, a pair or" gripperjaws to grip thetube firmly on its upwardly projecting pin whilst" being operated upon by the shaping tool, a spring to'cause the gripper jaws to close on to the tube, a ramp'device to open the jaws to release the tube after the latter has: been 'moved away from the shaping tool'by the res .4. "A machine for pressingor spinning over the end of a papertube to form an inturned rim at such end comprising the combination withan intermittently rotating table of a' plurality of upwardly projecting pins there onto receive the tubes, a revolving shaping tool belowwhich the tubes are successively carried by the intermittent movement of the table, a cam for bringing-the shaping :tool into engagement with the endof each tube as it isstationary below the tool to form the inturned rim, a pair of gripper aws to grip the tube firmly: on its upwardlyprojecting pin whilstbeing operated upon by the shaping tool, a spring to cause the gripper jaws to close on to thetube, a ramp device to open the jaws to release the tube after the latter has been movedaway from the shaping tool by the rotation of the table, springs acting on' the pins to cause the withdrawal thereof below the surface of the table after .the tubev thereon has been acted upon by the-shaping tool and a stationary plate with a recess there on arranged below the table, the said plate 130 normally-holding thepins in their raised position but allowing the springs to withdraw the pins when immediately above the recess the end of a paper tube to form an inturned rimat such end comprising the combination with an intermittently rotating table of a plurality of upwardly projecting pins there on to receive the tubes, a revolving shaping tool below which the tubes are successively carried by the intermittent movement of the table, a cam for bringing the shaping tool into engagement with-the end of each tube as it is stationary below the tool to form the inturned rim, a pair'of gripper jaws to grip the tube firmly on its upwardlyprojecting pin whilst being operated upon by the shaping tool, a spring to cause the gripper jaws to close on tothe tube, a ramp device to open the jaws to release the tube after the latter has been moved away from the shaping tool by the-rotation ofthe table, springs acting on the pins to cause the withdrawal thereof be low thesurface of the table after the tube thereon has been acted upon by the shaping tool, a stationary'plate with a recess therein arranged below the table, the said plate normally holding the pins in their raised position but allowing the springs to withdrawthe pins when immediately above the recess in the plate and means for removing each'finished tube from the table after the withdrawal of the pin on which it has been mounted.

. 6. A machine for pressing or spinning over i the end of a paper tube to'form an'inturned rim at such end comprising the combination with an intermittently rotating table of a plurality of upwardly projecting pins thereon to receive the tubes, a revolving shaping tool below which the tubes are successively carried by the intermittent movement of the the end of a paper tube to form an inturned I rim' at such end comprising the combination with an intermittently rotating table of a plurality of upwardly projecting pins'thereon to receive the tubes, a revolving shaping tool below which the tubes are successively carried by-the intermittent movement of the table, a cam for bringing the shaping tool into I tation of the table, springs acting on the pins to cause the withdrawal thereof below the surface of the table after the tube thereon has been acted upon by. the shaping tool, a stationary plate with a recess therein arranged below the table, the said plate normally holding the pins in their raised position but allowing the springs .to withdraw the pins when immedi-o ately above the recess in the plate, an oscillating arm for removing each finished tube from the surface of the table after the with-j drawal of the pinion which it has been mount ed and cam mechanism for operating said oscillating arm. 7 I a p In testimony whereof I have hereunto setmy hand. a

I TOM FAR-ROW.

7 table, a cam for bringing the shaping tool- V into engagement with the end'of each tube as it is stationary below the tool to form the inturned rim, a pair of gripper jaws to grip thetube firmly on its upwardly projecting pin whilst being operated upon bythe shaping tool, a spring to cause the gripper jaws to close onto the tube,a ramp device to open the jaws to release thetube after the latter has been moved away from the shaping tool by therotati-on of the table, springs acting onthe pins to cause the withdrawal thereofbelow the surface of the table after the tube thereonhas been acted upon by the shaping" tool, a stationary plate with a'recess therein arranged below the table, the said plate normally holding the pins in their raised posieach'jfinished tube fromthe surface of the table 'after the withdrawal of a i which it hasbeen mounted;

V 'the pin on Amachine for pressing or spinningover 

